ClueLuma

Airflow inferred from a sensible heat rate calculator

Infer standard-air flow from independently measured sensible heat and temperature difference, without using a latent load.

Units
Qair=qs1.08×ΔTQ_{\text{air}} = \frac{q_{s}}{1.08 \times \Delta T}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

Btu/h
°F
cfm

Worked example

Given

  • qsq_{s} = 21,600 Btu/h
  • ΔT\Delta T = 10 °F
Qair=21,6001.08×10=2,000Q_{\text{air}} = \frac{21{,}600}{1.08 \times 10} = 2{,}000

Symbols and units

SymbolMeaningUnit
QairQ_{\text{air}}standard-air volume flowcfm
qsq_{s}known sensible heat rateBtu/h
ΔT\Delta Tair temperature change°F

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Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.